White Board Paint.

In my videos I stand in front of a massive whiteboard.

Here's what I did.

I painted my wall with whiteboard paint (Link: http://dryerase.dulux.com.au/what-is-it/dryerase-white-coat/)

You can then write on it with whiteboard textas.

The white board paint is Resene, they’re in Crows Nest.

An alternative is to get sheets of whiteboard from Bunnings

http://www.bunnings.com.au/2440-x-1220-x-3-2mm-masonite-whitecote_p0247430/